Mac Pro 5.1 won't turn on

[fred_Mpro]

Hello!

I have Mac Pro 5.1 single cpu and i have problem with it. When i press de power bouton the mac pro won't turn on, if i press de power bouton 3-4 second the mac turn on, fan, hard drive, graphic card fan wake up but i dont have shime or image.

When i press de checkup LED i have the power trickle and power led. CPU led is off. CPU tray? if is the cpu tray is my 2 case in 2 day lol.

Thanks you

PS : Sorry for my english

 

[fred_Mpro]

After reseat of power bouton cable, the mac pro turn on, but i don't have any shime or video. Fan and power led is on. But the efi led and cpu led is off. If i remove all memory slot same thing... CPU Tray is dead? he don't detect the empty memory slot.

 

[Ih8reno]

try this?

https://support.apple.com/en-ca/HT201295

 

[fred_Mpro]

All reset is done, RTC, SMC. my problem is : i don't have other Mac 5.1 for test the cpu tray... In 2 day i have 2 customer at my job have same problem. 400$US for testing is not very good way lol.

 

[Ih8reno]

did you try other ram?

 

[h9826790]

Is it possible take it to Apple? Free test avail at there.

 

[fred_Mpro]

Yes and other ram does't work too.

Go to apple is useless, im Apple Technicien too and i have same tool. But the Mac Pro 5.1 is not my thing. Mac Pro 1.1,2.1,3.1 i know all the thing haha.

Try to find other cpu tray...

 

[fred_Mpro]

I have CPU Tray of Mac Pro 4.1, but is defect and when i test the fan go to maximum spin..

 

[h9826790]

That's normal, the SMC version of a 4,1 CPU tray doesn't match the SMC on the 5,1 mobo, which will cause the fan run at max speed.